JPH11236348A - Production of 2-alkoxy-3-arylpropionic acid - Google Patents

Production of 2-alkoxy-3-arylpropionic acid

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Publication number
JPH11236348A
JPH11236348A JP5608798A JP5608798A JPH11236348A JP H11236348 A JPH11236348 A JP H11236348A JP 5608798 A JP5608798 A JP 5608798A JP 5608798 A JP5608798 A JP 5608798A JP H11236348 A JPH11236348 A JP H11236348A
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JP
Japan
Prior art keywords
group
acid
represented
formula
general formula
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Ceased
Application number
JP5608798A
Other languages
Japanese (ja)
Inventor
Yutaka Nomura
豊 野村
Atsushi Tendou
▲あつし▼ 天童
Shogo Sakuma
詔悟 佐久間
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Nippon Chemiphar Co Ltd
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Nippon Chemiphar Co Ltd
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Application filed by Nippon Chemiphar Co Ltd filed Critical Nippon Chemiphar Co Ltd
Priority to JP5608798A priority Critical patent/JPH11236348A/en
Publication of JPH11236348A publication Critical patent/JPH11236348A/en
Ceased legal-status Critical Current

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  • Plural Heterocyclic Compounds (AREA)
  • Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
  • Low-Molecular Organic Synthesis Reactions Using Catalysts (AREA)

Abstract

PROBLEM TO BE SOLVED: To industrially and economically obtain the subject compound having insulin resistance-improving action and useful as an antidiabetic by adding an additive such as silver oxide to a metal salt of a specific halopropionic acid and then reacting the mixture. SOLUTION: This compound of formula II is obtained by reacting (A) a metal salt of 3-arylpropionic acid expressed by formula I (A is an aryl; X is an eliminable group) with an alcohol expressed by R-OH (R is an alkyl) in the presence of (B) an additive selected from weak acid salts of alkali metals, alkaline-earth metals or silver, and oxides of alkaline-earth metals or silver. It is preferable that the reaction is conducted after adding (C) an equivalent or a slightly excess amount of an alkali to the component A and that, as the component B, silver oxide, calcium carbonate or cesium carbonate is used.

Description

【発明の詳細な説明】DETAILED DESCRIPTION OF THE INVENTION

【0001】[0001]

【産業上の利用分野】本発明は2−アルコキシ−3−ア
リ−ルプロピオン酸の新規な製造方法に関する。
The present invention relates to a novel process for producing 2-alkoxy-3-arylpropionic acids.

【0002】[0002]

【従来の技術及び発明が解決しようとする課題】次の一
般式(I)、
2. Description of the Related Art The following general formula (I):

【化11】 (式中Aはアリール基を表し、そしてRはアルキル基を
表す)で表される2−アルコキシ−3−アリ−ルプロピ
オン酸はインスリン抵抗性改善作用を有し、糖尿病治療
剤として有用であることが知られている。(WO 94
29302、WO 9517394、特開平7−149
636) また、本発明者らは,上記一般式(I)に含まれる次式
(V)、
Embedded image Wherein A represents an aryl group and R represents an alkyl group. The 2-alkoxy-3-arylpropionic acid represented by the formula (I) has an insulin sensitizing effect and is useful as a therapeutic agent for diabetes. It is known. (WO 94
29302, WO 9517394, JP-A-7-149
636) Further, the present inventors have found that the following formula (V) contained in the above general formula (I),

【化12】 で表される2−エトキシ−3−[3−[2−(2−フェ
ニル−5−メチル−4−オキサゾリル)エチル]−1,
2−ベンズイソキサゾール−6−イル]プロピオン酸
が、優れた血糖降下作用、脂質低下作用を有し、糖尿病
治療剤、高脂血症治療剤として有用であることを見い出
し特許出願している。(特願平9−365978)
Embedded image 2-ethoxy-3- [3- [2- (2-phenyl-5-methyl-4-oxazolyl) ethyl] -1, represented by
2-benzisoxazol-6-yl] propionic acid has an excellent hypoglycemic effect and hypolipidemic effect, and has been found to be useful as a therapeutic agent for diabetes and hyperlipidemia, and has filed a patent application. . (Japanese Patent Application No. 9-365978)

【0003】ところで、2−アルコキシ−3−アリ−ル
プロピオン酸の製造方法としては、例えば上記の式
(V)で表される化合物は下記の合成スキ−ムで示すよ
うにアミン体(1)からアルデヒド体(3)を経由して
合成することができる。
By the way, as a method for producing 2-alkoxy-3-arylpropionic acid, for example, a compound represented by the above formula (V) is prepared by reacting an amine compound (1) as shown in the following synthesis scheme. Can be synthesized via the aldehyde (3).

【化13】 しかしながら、この方法は、アルデヒド体(3)の合成
反応の再現性が乏しく、しかも工程が長く、通算収率が
低い等の問題がある。一方、アリ−ルアミンから容易に
合成できる3−アリ−ル−2−ハロプロピオン酸を原料
とした2−アルコキシ−3−アリ−ルプロピオン酸への
置換反応は、ほとんど報告がなされていない。これは3
−アリ−ル−2−ハロプロピオン酸からハロゲン化水素
が脱離しやすく、反応のコントロールが困難であると考
えられる。事実、本発明者らはこの方法を用いて2−ア
ルコキシ−3−アリ−ルプロピオン酸の合成を試みた
が、オレフィンの副生から反応は複雑となり、目的物の
取得は困難であった。
Embedded image However, this method has problems in that the reproducibility of the synthesis reaction of the aldehyde compound (3) is poor, the steps are long, and the total yield is low. On the other hand, few reports have been made on the substitution reaction with 2-alkoxy-3-arylpropionic acid starting from 3-aryl-2-halopropionic acid which can be easily synthesized from arylamine. This is 3
It is considered that hydrogen halide is easily eliminated from aryl-2-halopropionic acid, and it is considered difficult to control the reaction. In fact, the present inventors tried to synthesize 2-alkoxy-3-arylpropionic acid using this method, but the reaction was complicated by the olefin by-product, and it was difficult to obtain the desired product.

【0004】[0004]

【課題を解決するための手段】本発明の目的は上記一般
式(I)で表される2−アルコキシ−3−アリ−ルプロ
ピオン酸の工業的、経済的な製造方法を提供することに
ある。本発明者らは、2−アルコキシ−3−アリ−ルプ
ロピオン酸の工業的製法について鋭意検討した結果、原
料として3−アリ−ル−2−ハロプロピオン酸の金属塩
を用い、酸化銀、炭酸塩等の添加物を加え反応を行うこ
とで、上記一般式(I)で表される2−アルコキシ−3
−アリ−ルプロピオン酸が良好な収率で得られることを
見い出し本発明を完成した。
SUMMARY OF THE INVENTION An object of the present invention is to provide an industrial and economical method for producing 2-alkoxy-3-arylpropionic acid represented by the above general formula (I). . The present inventors have conducted intensive studies on the industrial production method of 2-alkoxy-3-arylpropionic acid, and as a result, using a metal salt of 3-aryl-2-halopropionic acid as a raw material, silver oxide, carbonate By reacting with an additive such as a salt, 2-alkoxy-3 represented by the above general formula (I) is obtained.
It has been found that arylpropionic acid can be obtained in good yield, and the present invention has been completed.

【0005】[製法1]即ち、本発明は次の一般式(I
I)、
[Production Method 1] That is, the present invention relates to the following general formula (I)
I),

【化14】 (式中、Aはアリ−ル基を表し、そしてXは脱離基を表
す)で表される3−アリ−ルプロピオン酸の金属塩を、
アルカリ金属、アルカリ土類金属若しくは銀の弱酸塩、
又はアルカリ土類金属若しくは銀の酸化物から選ばれる
添加剤の存在下、 R-OH (式中、Rはアルキル基を表す)で表されるアルコ−ル
と反応させることを特徴とする、一般式(I)、
Embedded image (Wherein A represents an aryl group and X represents a leaving group), a metal salt of 3-arylpropionic acid represented by the formula:
Weak salts of alkali metals, alkaline earth metals or silver,
Or reacting with an alcohol represented by R-OH (wherein R represents an alkyl group) in the presence of an additive selected from an alkaline earth metal or silver oxide. Formula (I),

【化15】 (式中、A及びRは前記と同じ)で表される2−アルコ
キシ−3−アリ−ルプロピオン酸の製造方法に関する。
Embedded image (Wherein A and R are the same as described above).

【0006】[製法2]また、本発明は一般式(II)、[Production Method 2] The present invention relates to a compound represented by the general formula (II):

【化16】 (式中、Aはアリ−ル基を表し、そしてXは脱離基を表
す)で表される3−アリ−ルプロピオン酸に、当量〜少
過剰のアルカリを加えた後、これをアルカリ金属、アル
カリ土類金属若しくは銀の弱酸塩、又はアルカリ土類金
属若しくは銀の酸化物から選ばれる添加剤の存在下、 R-OH (式中、Rはアルキル基を表す)で表されるアルコ−ル
と反応させることを特徴とする、一般式(I)、
Embedded image (Wherein A represents an aryl group and X represents a leaving group). An equivalent to a small excess of alkali is added to 3-arylpropionic acid represented by the formula An alcohol represented by R-OH (wherein R represents an alkyl group) in the presence of an additive selected from a weak acid salt of an alkaline earth metal or silver, or an oxide of an alkaline earth metal or silver. A compound represented by the following general formula (I):

【化17】 (式中、A及びRは前記と同じ)で表される2−アルコ
キシ−3−アリ−ルプロピオン酸の製造方法に関する。
Embedded image (Wherein A and R are the same as described above).

【0007】[製法3]また、本発明は次の一般式(I
I)、
[Production method 3] The present invention relates to the following general formula (I)
I),

【化18】 (式中、Aはアリ−ル基を表し、そしてXは脱離基を表
す)で表される3−アリ−ルプロピオン酸の金属塩を、
アルカリ金属、アルカリ土類金属若しくは銀の弱酸塩、
又はアルカリ土類金属若しくは銀の酸化物から選ばれる
添加剤の存在下、水と反応させ、一般式(III)、
Embedded image (Wherein A represents an aryl group and X represents a leaving group), a metal salt of 3-arylpropionic acid represented by the formula:
Weak salts of alkali metals, alkaline earth metals or silver,
Or reacting with water in the presence of an additive selected from alkaline earth metals or silver oxides;

【化19】 (式中、Aは前記と同じ)で表される3−アリ−ル−2
−ヒドロキシプロピオン酸を得た後、次いでこれをカル
ボン酸基の保護或いは無保護下に、アルキル化剤と反応
させ、さらに必要に応じてカルボン酸基の保護基を脱離
することを特徴とする、一般式(I)、
Embedded image (Wherein A is the same as described above)
After obtaining hydroxypropionic acid, this is then reacted with an alkylating agent with or without protection of the carboxylic acid group, and if necessary, the protecting group of the carboxylic acid group is eliminated. , The general formula (I),

【化20】 (式中、Rはアルキル基を表し、そしてAは前記と同
じ)で表される2−アルコキシ−3−アリ−ルプロピオ
ン酸の製造方法に関する。
Embedded image (Wherein R represents an alkyl group, and A is the same as described above).

【0008】[製法4]さらにまた本発明は一般式(I
V)、
[Production Method 4] The present invention further relates to a compound represented by the general formula (I)
V),

【化21】 (式中、Aはアリ−ル基を表し、R0はアルキル基を表
し、そしてXは脱離基を表す)で表される3−アリ−ル
プロピオン酸エステルにアルカリを加え、これをアルカ
リ金属、アルカリ土類金属若しくは銀の弱酸塩、又はア
ルカリ土類金属若しくは銀の酸化物から選ばれる添加剤
の存在下、水と反応させ、一般式(III)、
Embedded image Wherein A represents an aryl group, R 0 represents an alkyl group, and X represents a leaving group, and an alkali is added to the 3-arylpropionate represented by the formula Reacting with water in the presence of an additive selected from a metal, an alkaline earth metal or silver weak acid salt, or an alkaline earth metal or silver oxide;

【化22】 (式中、Aは前記と同じ)で表される3−アリ−ル−2
−ヒドロキシプロピオン酸を得た後、次いでこれをカル
ボン酸基の保護或いは無保護下に、アルキル化剤と反応
させ、さらに必要に応じてカルボン酸基の保護基を脱離
することを特徴とする、一般式(I)、
Embedded image (Wherein A is the same as described above)
After obtaining hydroxypropionic acid, this is then reacted with an alkylating agent with or without protection of the carboxylic acid group, and if necessary, the protecting group of the carboxylic acid group is eliminated. , The general formula (I),

【化23】 (式中、Rはアルキル基を表し、そしてAは前記と同
じ)で表される2−アルコキシ−3−アリ−ルプロピオ
ン酸の製造方法に関する。
Embedded image (Wherein R represents an alkyl group, and A is the same as described above).

【0009】上記の製法1について詳細に説明する。製
法1は以下の反応式で表される。
The above-mentioned production method 1 will be described in detail. Production method 1 is represented by the following reaction formula.

【化24】 [ここで、Aで表されるアリール基としては、フェニル
基、ナフチル基、ベンズイソキサゾ−ル基、ピリジル
基、チエニル基、フリル基、キノリル基、ベンゾ[b]
フラニル基等が挙げられ、アリ−ル基は置換基を有して
いても良い。また、Rで表されるアルキル基としては、
炭素数1〜10アルキル基、好ましくはメチル基、エチ
ル基、プロピル基等の炭素数1〜6のアルキル基が挙げ
られ、アルキル基は置換基を有していても良い。Xで表
される脱離基としては、臭素原子、塩素原子、ヨウ素原
子等のハロゲン原子、トシルオキシ基、メシルオキシ基
等が挙げられる。Mはナトリウムイオン、カリウムイオ
ン等のアルカリ金属イオンが挙げられる。」
Embedded image [Here, the aryl group represented by A includes phenyl, naphthyl, benzisoxazole, pyridyl, thienyl, furyl, quinolyl, benzo [b]
A furanyl group; and the aryl group may have a substituent. Further, as the alkyl group represented by R,
Examples thereof include an alkyl group having 1 to 10 carbon atoms, preferably an alkyl group having 1 to 6 carbon atoms such as a methyl group, an ethyl group, and a propyl group, and the alkyl group may have a substituent. Examples of the leaving group represented by X include a bromine atom, a chlorine atom, a halogen atom such as an iodine atom, a tosyloxy group, a mesyloxy group, and the like. M is an alkali metal ion such as a sodium ion and a potassium ion. "

【0010】この反応はエタノ−ル等の反応に関与しな
い溶媒中、0℃〜溶媒の沸点の温度範囲で行われる。好
ましい添加剤としては、炭酸カルシウム、炭酸セシウム
等のアルカリ金属若しくはアルカリ土類金属の炭酸塩、
又は酸化銀が挙げられる。添加剤の量は一般式(II)で
表される3−アリ−ルプロピオン酸1モルに対し、1.
0〜3.0モルが好ましい。また、ROHで表されるア
ルコールの量は、一般式(II)で表される3−アリ−ル
プロピオン酸に対し、等モル〜大過剰用いることができ
る。尚、一般式(II)で表される3−アリ−ルプロピオ
ン酸の金属塩は、次の一般式(IV)、
This reaction is carried out in a solvent which does not participate in the reaction such as ethanol, at a temperature ranging from 0 ° C. to the boiling point of the solvent. Preferred additives include calcium carbonate, alkali metal or alkaline earth metal carbonates such as cesium carbonate,
Or silver oxide. The amount of the additive is 1. with respect to 1 mol of 3-arylpropionic acid represented by the general formula (II).
0-3.0 mol is preferred. The amount of the alcohol represented by ROH can be used in an equimolar amount to a large excess with respect to the 3-arylpropionic acid represented by the general formula (II). The metal salt of 3-arylpropionic acid represented by the general formula (II) is represented by the following general formula (IV):

【化25】 (式中、R0は炭素数1〜10のアルキル基、好ましく
はメチル基、エチル基、プロピル基等の炭素数1〜6の
アルキル基が挙げられ、A及びXは前記と同じ)で表さ
れるエステル体、又は遊離の一般式(II)で表される3
−アリ−ルプロピオン酸にTHF、水等の溶媒中、3−
アリ−ルプロピオン酸1モルに対し、1.0〜1.3モ
ルのアルカリ(水酸化ナトリム等のアルカリ金属水酸化
物、水素化ナトリウム等のアルカリ金属水素化物、ナト
リウムエトキシド等のアルコキシド等)を加えることで
得ることができ、ここで得られた金属塩は単離せずにそ
のまま本発明方法に使用することもできる。
Embedded image (Wherein R 0 is an alkyl group having 1 to 10 carbon atoms, preferably an alkyl group having 1 to 6 carbon atoms such as a methyl group, an ethyl group, and a propyl group, and A and X are the same as those described above). Represented by the general formula (II):
-Aryl propionic acid in a solvent such as THF, water, etc., 3-
1.0 to 1.3 mol of alkali (1 mol of arylpropionic acid) (alkali metal hydroxide such as sodium hydroxide, alkali metal hydride such as sodium hydride, alkoxide such as sodium ethoxide) And the metal salt obtained here can be used in the method of the present invention without isolation.

【0011】製法2は出発物質として遊離の一般式(I
I)で表される3−アリ−ルプロピオン酸を用い、これ
をTHF、水等の溶媒中、当量〜少過剰のアルカリを加
え、以後上記の製法1と同様な方法で行われる。
Process 2 uses a free compound of the general formula (I
Using 3-arylpropionic acid represented by I), an equivalent to a small excess of an alkali is added to a solvent such as THF or water, and thereafter the same method as in Production method 1 described above is carried out.

【0012】次に上記の製法3について詳細に説明す
る。製法3は以下の反応式で表される。
Next, the above-mentioned production method 3 will be described in detail. Production method 3 is represented by the following reaction formula.

【化26】 [式中、A,R,X及びMは製法1と同じものが挙げら
れる。]
Embedded image [Wherein, A, R, X and M are the same as those in Production Method 1.] ]

【0013】上記の(i)の工程は、THF等の溶媒
中、0℃〜溶媒の沸点の温度範囲で行われる。好ましい
添加剤の種類は製法1と同じものが挙げられる。尚、一
般式(II)で表される3−アリ−ルプロピオン酸の金属
塩は、製法1に記載の方法と同様な方法で得ることがで
きる。次に上記の(ii)の工程は、THF等の溶媒中、
3−アリ−ル−2−ヒドロキシプロピオン酸にハロゲン
化アルキル、硫酸ジアルキル等のアルキル化剤を作用さ
せることで行われる。アルキル化剤の量は3−アリ−ル
−2−ヒドロキシプロピオン酸1モルに対し、等モル〜
20倍モル用いられる。またこの工程は、3−アリ−ル
−2−ヒドロキシプロピオン酸のカルボン酸基を一端保
護基により保護した後、アルキル化剤と反応させ、その
後、カルボン酸基の保護基を脱離することにより目的物
である2−アルコキシ−3−アリ−ルプロピオン酸を得
ることもできる。カルボン酸の保護基としてアルキル基
を用いる場合、即ち3−アリ−ル−2−ヒドロキシプロ
ピオン酸アルキルエステルは、3−アリ−ル−2−ヒド
ロキシプロピオン酸を公知のエステル化反応(例えば、
硫酸等の触媒の存在下、アルコールと反応させる)に付
すことで得ることができる。アルキル化剤との反応後の
脱保護は、例えば2−アルコキシ−3−アリ−ルプロピ
オン酸アルキルエステルは水酸化ナトリウム等を用いた
加水分解反応に付すことで目的物である2−アルコキシ
−3−アリ−ルプロピオン酸を得ることができる。
The step (i) is carried out in a solvent such as THF at a temperature ranging from 0 ° C. to the boiling point of the solvent. Preferred types of additives are the same as in Production Method 1. The metal salt of 3-arylpropionic acid represented by the general formula (II) can be obtained by a method similar to the method described in Production Method 1. Next, the step (ii) is performed in a solvent such as THF,
The reaction is carried out by allowing an alkylating agent such as an alkyl halide or dialkyl sulfate to act on 3-aryl-2-hydroxypropionic acid. The amount of the alkylating agent is from equimolar to 1 mol of 3-aryl-2-hydroxypropionic acid.
It is used in a molar amount of 20 times. In this step, the carboxylic acid group of 3-aryl-2-hydroxypropionic acid is protected with a protecting group once, then reacted with an alkylating agent, and then the protecting group of the carboxylic acid group is eliminated. The desired product, 2-alkoxy-3-arylpropionic acid, can also be obtained. When an alkyl group is used as a protecting group for a carboxylic acid, that is, an alkyl 3-aryl-2-hydroxypropionate is obtained by subjecting 3-aryl-2-hydroxypropionic acid to a known esterification reaction (for example,
(Reaction with alcohol in the presence of a catalyst such as sulfuric acid). The deprotection after the reaction with the alkylating agent is carried out, for example, by subjecting the 2-alkoxy-3-arylpropionic acid alkyl ester to a hydrolysis reaction using sodium hydroxide or the like to obtain the desired product, 2-alkoxy-3. -Arylpropionic acid can be obtained.

【0014】尚、製法4は出発物質として次の一般式
(IV)、
The production method 4 uses the following general formula (IV) as a starting material:

【化27】 (式中、R0は炭素数1〜10のアルキル基、好ましく
はメチル基、エチル基、プロピル基等の炭素数1〜6の
アルキル基が挙げられ、A及びXは前記と同じ)で表さ
れるエステル体を用い、これをTHF、水等の溶媒中、
当量〜少過剰のアルカリを加え、以後上記の製法3と同
様な方法を用いて行われる。
Embedded image (Wherein R 0 is an alkyl group having 1 to 10 carbon atoms, preferably an alkyl group having 1 to 6 carbon atoms such as a methyl group, an ethyl group, and a propyl group, and A and X are the same as those described above). Is used in a solvent such as THF or water,
After adding an equivalent to a small excess of alkali, the reaction is carried out in the same manner as in Production Method 3 described above.

【0015】[0015]

【実施例】次いで参考例、実施例により本発明を更に詳
細に説明するが、本発明はこれらによって何ら限定され
るものではない。 参考例1 2−ブロモ−3−[3−[2−(2−フェニル−5−メ
チル−4−オキサゾリル)エチル]−1,2−ベンズイ
ソキサゾール−6−イル]プロピオン酸メチル 6−アミノ−3−[2−(2−フェニル−5−メチル−
4−オキサゾリル)エチル]−1,2−ベンズイソキサ
ゾ−ル(1g,3.13mmol)をアセトン(10m
l)に溶かし、氷冷下47%臭化水素酸(1ml)を加
え、同温にて亜硝酸ナトリウム(259mg,3.76
mmol)と水(1ml)の溶液を滴下し、そのまま1
5分間攪拌した。これにアクリル酸メチル(2.69
g,31.3mmol)と臭化第一銅(10mg)を加
え、窒素の発生がおさまるまで室温で20分間攪拌し
た。氷冷下反応液に飽和重曹水を加え酢酸エチルにて抽
出、飽和食塩水で洗浄後、無水硫酸ナトリウムにて乾燥
した。減圧下溶媒を留去して得られた粗体をシリカゲル
カラムクロマトグラフィ−に付し、n−ヘキサン/酢酸
エチル=3/1の溶出部より標題化合物(1.0g,6
8.0%)を黄色油状物として得た。
EXAMPLES Next, the present invention will be described in more detail by reference examples and examples, but the present invention is not limited to these examples. Reference Example 1 Methyl 2-bromo-3- [3- [2- (2-phenyl-5-methyl-4-oxazolyl) ethyl] -1,2-benzisoxazol-6-yl] propionate 6-amino -3- [2- (2-phenyl-5-methyl-
4-oxazolyl) ethyl] -1,2-benzisoxazole (1 g, 3.13 mmol) in acetone (10 m
l), 47% hydrobromic acid (1 ml) was added thereto under ice cooling, and sodium nitrite (259 mg, 3.76) was added at the same temperature.
mmol) and water (1 ml) are added dropwise.
Stir for 5 minutes. Methyl acrylate (2.69)
g, 31.3 mmol) and cuprous bromide (10 mg), and the mixture was stirred at room temperature for 20 minutes until the generation of nitrogen was stopped. To the reaction mixture was added a saturated aqueous solution of sodium bicarbonate under ice-cooling, extracted with ethyl acetate, washed with saturated saline and dried over anhydrous sodium sulfate. The crude product obtained by evaporating the solvent under reduced pressure was subjected to silica gel column chromatography, and the title compound (1.0 g, 6 g) was eluted with n-hexane / ethyl acetate = 3/1.
8.0%) as a yellow oil.

【0016】1H−NMR(CDCl3) δ: 2.16(3H,s) 3.04(2H,t,J=7Hz) 3.3〜3.4(3H,m) 3.59(1H,dd,J=8,14Hz) 3.73(3.73,3H,s) 4.43(1H,t,J=7Hz) 7.09(1H,dd,J=2,8Hz) 7.4〜7.5(4H,m) 7.50(1H,d,J=8Hz) 7.9〜8.0(2H,m) 1 H-NMR (CDCl 3 ) δ: 2.16 (3H, s) 3.04 (2H, t, J = 7 Hz) 3.3 to 3.4 (3H, m) 3.59 (1H) , Dd, J = 8, 14 Hz) 3.73 (3.73, 3H, s) 4.43 (1H, t, J = 7 Hz) 7.09 (1H, dd, J = 2.8 Hz) 7.4 -7.5 (4H, m) 7.50 (1H, d, J = 8Hz) 7.9-8.0 (2H, m)

【0017】参考例2 2−ブロモ−3−[3−[2−(2−フェニル−5−メ
チル−4−オキサゾリル)エチル]−1,2−ベンズイ
ソキサゾ−ル−6−イル]プロピオン酸 参考例1で得られた2−ブロモ−3−[3−[2−(2
−フェニル−5−メチル−4−オキサゾリル)エチル]
−1,2−ベンズイソキサゾ−ル−6−イル]プロピオ
ン酸メチル(2.90g,6.17mmol)をTHF
(テトラヒドロフラン)−水(20ml−10ml)の
混合溶媒に溶解させた後、1N水酸化ナトリウム水溶液
(6.17ml)を加え室温で一晩攪拌した。反応終了
を確認した後、1N塩酸を加え酸性としTHFを減圧下
留去した。析出した結晶を瀘取した後、ジエチルエーテ
ルおよび水で洗浄することで白色結晶である標題化合物
2.0gを得た。(収率71%)
REFERENCE EXAMPLE 2 2-bromo-3- [3- [2- (2-phenyl-5-methyl-4-oxazolyl) ethyl] -1,2-benzisoxazol-6-yl] propionic acid Reference example 2-bromo-3- [3- [2- (2
-Phenyl-5-methyl-4-oxazolyl) ethyl]
Methyl-1,2-benzisoxazol-6-yl] propionate (2.90 g, 6.17 mmol) in THF
After being dissolved in a mixed solvent of (tetrahydrofuran) -water (20 ml-10 ml), a 1N aqueous sodium hydroxide solution (6.17 ml) was added, and the mixture was stirred at room temperature overnight. After confirming the completion of the reaction, the mixture was acidified with 1N hydrochloric acid, and THF was distilled off under reduced pressure. The precipitated crystals were collected by filtration and washed with diethyl ether and water to obtain 2.0 g of the title compound as white crystals. (Yield 71%)

【0018】1H−NMR(DMSO−d6) δ: 2.17(3H,s) 2.98(2H,t,J=7Hz) 3.2〜3.4(3H,m) 3.54(1H,dd,J=7,14Hz) 4.72(1H,t,J=7Hz) 7.28(1H,d,J=8Hz) 7.45〜7.55(3H,m) 7.62(1H,s) 7.78(1H,d,J=8Hz) 7.9〜8.0(2H,m) 1 H-NMR (DMSO-d 6 ) δ: 2.17 (3H, s) 2.98 (2H, t, J = 7 Hz) 3.2-3.4 (3H, m) 3.54 (1H, dd, J = 7, 14 Hz) 4.72 (1H, t, J = 7 Hz) 7.28 (1H, d, J = 8 Hz) 7.45 to 7.55 (3H, m) 7.62 (1H, s) 7.78 (1H, d, J = 8 Hz) 7.9 to 8.0 (2H, m)

【0019】実施例1 2−エトキシ−3−[3−[2−(2−フェニル−5−
メチル−4−オキサゾリル)エチル]−1,2−ベンズ
イソキサゾール−6−イル]プロピオン酸 参考例2で得られた2−ブロモ−3−[3−[2−(2
−フェニル−5−メチル−4−オキサゾリル)エチル]
−1,2−ベンズイソキサゾール−6−イル]プロピオ
ン酸(227mg.0.50mmol)をエタノール1
0mlに溶解させた後、ナトリウムエトキシド(41m
g)を加えた。室温で30分間攪拌後、酸化銀(232
mg,1.00mmol)を加え24時間加熱還流し
た。原料の消失を確認した後、酢酸エチルおよび1N塩
酸を加え酢酸エチル層を分取した。この酢酸エチル層を
水および食塩水で洗浄後、無水硫酸ナトリウムで乾燥し
た後、溶媒を減圧留去した。続いて得られた残渣をシリ
カゲルカラムクロマトゲラフィー(クロロホルム/メタ
ノール=100/1)で精製し、白色結晶である標題化
合物65mg(収率31%)を得た。
Example 1 2-ethoxy-3- [3- [2- (2-phenyl-5-
Methyl-4-oxazolyl) ethyl] -1,2-benzisoxazol-6-yl] propionic acid 2-bromo-3- [3- [2- (2
-Phenyl-5-methyl-4-oxazolyl) ethyl]
[1,2-benzisoxazol-6-yl] propionic acid (227 mg. 0.50 mmol) in ethanol 1
After dissolving in 0 ml, sodium ethoxide (41 m
g) was added. After stirring at room temperature for 30 minutes, silver oxide (232
mg, 1.00 mmol) and heated under reflux for 24 hours. After confirming the disappearance of the raw materials, ethyl acetate and 1N hydrochloric acid were added, and the ethyl acetate layer was separated. The ethyl acetate layer was washed with water and brine, dried over anhydrous sodium sulfate, and the solvent was distilled off under reduced pressure. Subsequently, the obtained residue was purified by silica gel column chromatography (chloroform / methanol = 100/1) to obtain 65 mg (yield 31%) of the title compound as white crystals.

【0020】1H−NMR(CDCl3) δ: 1.16(3H,t,J=7Hz) 2.16(3H,s) 3.02(2H,t,J=7Hz) 3.16(1H,dd,J=8,14Hz) 3.27(1H,dd,J=4,14Hz) 3.33(2H,t,J=7Hz) 3.35〜3.50(1H,m) 3.55〜3.70(1H,m) 4.14(1H,dd,J=4,8Hz) 7.14(1H,d,J=8Hz) 7.4〜7.5(4H,m) 7.47(1H,d,J=8Hz) 7.9〜8.0(2H,m) 1 H-NMR (CDCl 3 ) δ: 1.16 (3H, t, J = 7 Hz) 2.16 (3H, s) 3.02 (2H, t, J = 7 Hz) 3.16 (1H) , Dd, J = 8, 14 Hz) 3.27 (1H, dd, J = 4, 14 Hz) 3.33 (2H, t, J = 7 Hz) 3.35 to 3.50 (1H, m) 3.55 33.70 (1H, m) 4.14 (1H, dd, J = 4.8 Hz) 7.14 (1H, d, J = 8 Hz) 7.4〜7.5 (4H, m) 7.47 (1H, d, J = 8 Hz) 7.9 to 8.0 (2H, m)

【0021】IR(KBr)cm-1:1720,171
0,1640,1620,1600,1550,152
0,1490,1480,1450,1410,138
0,1360,1340,1280,1250,121
0,1120,940,860,780,710,70
0,650
IR (KBr) cm -1 : 1720, 171
0, 1640, 1620, 1600, 1550, 152
0, 1490, 1480, 1450, 1410, 138
0, 1360, 1340, 1280, 1250, 121
0, 1120, 940, 860, 780, 710, 70
0,650

【0022】実施例2 2−エトキシ−3−(4−メチルフェニル)プロピオン
酸 常法により合成した2−ブロモ−3−(4−メチルフェ
ニル)プロピオン酸(121mg,0.50mmol)
をエタノール5mlに溶解させた後、ナトリウムエトキ
シド(41mg)を加えた。室温で30分間攪拌後、酸
化銀(232mg,1.00mmol)を加え24時間
加熱還流した。反応終了を確認した後、酢酸エチルおよ
び1N塩酸を加えた。酢酸エチル層を分取後、水で洗浄
し無水硫酸ナトリウムで乾燥し溶媒を減圧留去した。続
いてこの残渣を薄層クロマトゲラフィー(クロロホルム
/メタノール=10/1)で精製することで微黄色油状
物である標題化合物36mg(収率38%)を得た。
Example 2 2-ethoxy-3- (4-methylphenyl) propionic acid 2-bromo-3- (4-methylphenyl) propionic acid (121 mg, 0.50 mmol) synthesized by a conventional method.
Was dissolved in 5 ml of ethanol, and sodium ethoxide (41 mg) was added. After stirring at room temperature for 30 minutes, silver oxide (232 mg, 1.00 mmol) was added, and the mixture was heated under reflux for 24 hours. After confirming the completion of the reaction, ethyl acetate and 1N hydrochloric acid were added. The ethyl acetate layer was separated, washed with water, dried over anhydrous sodium sulfate, and the solvent was distilled off under reduced pressure. Subsequently, the residue was purified by thin-layer chromatography (chloroform / methanol = 10/1) to obtain 36 mg (yield: 38%) of the title compound as a slightly yellow oily substance.

【0023】1H−NMR(CDCl3) δ: 1.14(3H,t,J=7Hz) 2.31(3H,s) 2.93(1H,dd,J=8,14Hz) 3.10(1H,dd,J=4,14Hz) 3.3〜3.5(1H,m) 3.5〜3.7(1H,m) 4.03(1H,dd,J=4,8Hz) 7.08(2H,d,J=8Hz) 7.14(2H,d,J=8Hz) 1 H-NMR (CDCl 3 ) δ: 1.14 (3H, t, J = 7 Hz) 2.31 (3H, s) 2.93 (1H, dd, J = 8, 14 Hz) 3.10 (1H, dd, J = 4, 14 Hz) 3.3 to 3.5 (1H, m) 3.5 to 3.7 (1H, m) 4.03 (1H, dd, J = 4, 8 Hz) 7 0.08 (2H, d, J = 8 Hz) 7.14 (2H, d, J = 8 Hz)

【0024】実施例3 2−エトキシ−3−(4−メチルフェニル)プロピオン
酸 常法により合成した2−ブロモ−3−(4−メチルフェ
ニル)プロピオン酸(121mg.0.50mmol)
をエタノール5mlに溶解させた後、ナトリウムエトキ
シド(41mg)を加えた。室温で30分間攪拌後、炭
酸カルシウム(300mg,3.00mmol)を加え
48時間加熱還流した。反応終了を確認した後、酢酸エ
チルおよび1N塩酸を加えた。酢酸エチル層を分取した
後、水で洗浄し無水硫酸ナトリウムで乾燥し溶媒を減圧
留去した。続いてこの残渣を薄層クロマトゲラフィー
(クロロホルム/メタノール=10/1)にて精製する
ことで微黄油状物である標題化合物32mg(収率34
%)を得た。(NMRデータは実施例2と同じ)
Example 3 2-Ethoxy-3- (4-methylphenyl) propionic acid 2-bromo-3- (4-methylphenyl) propionic acid (121 mg. 0.50 mmol) synthesized by a conventional method.
Was dissolved in 5 ml of ethanol, and sodium ethoxide (41 mg) was added. After stirring at room temperature for 30 minutes, calcium carbonate (300 mg, 3.00 mmol) was added, and the mixture was heated under reflux for 48 hours. After confirming the completion of the reaction, ethyl acetate and 1N hydrochloric acid were added. The ethyl acetate layer was separated, washed with water, dried over anhydrous sodium sulfate, and the solvent was distilled off under reduced pressure. Subsequently, the residue was purified by thin-layer chromatography (chloroform / methanol = 10/1) to give 32 mg of the title compound as a pale yellow oil (yield: 34).
%). (The NMR data is the same as in Example 2.)

【0025】実施例4 2−エトキシ−3−(4−メチルフェニル)プロピオン
酸 常法により合成した2−ブロモ−3−(4−メチルフェ
ニル)プロピオン酸(121mg.0.50mmol)
をエタノール5mlに溶解させた後、ナトリウムエトキ
シド(41mg)を加えた。室温で30分間攪拌後、炭
酸セシウム(163mg,0.50mmol)を加え2
4時間加熱還流した。反応終了を確認した後、酢酸エチ
ルおよび1N塩酸を加えた。酢酸エチル層を分取した
後、水で洗浄し無水硫酸ナトリウムで乾燥し溶媒を減圧
留去した。続いてこの残渣を薄層クロマトゲラフィー
(クロロホルム/メタノール=10/1)にて精製する
ことで微黄油状物である標題化合物29mg(収率28
%)を得た。(NMRデータは実施例2と同じ)
Example 4 2-ethoxy-3- (4-methylphenyl) propionic acid 2-bromo-3- (4-methylphenyl) propionic acid (121 mg. 0.50 mmol) synthesized by a conventional method.
Was dissolved in 5 ml of ethanol, and sodium ethoxide (41 mg) was added. After stirring at room temperature for 30 minutes, cesium carbonate (163 mg, 0.50 mmol) was added and 2
The mixture was heated under reflux for 4 hours. After confirming the completion of the reaction, ethyl acetate and 1N hydrochloric acid were added. The ethyl acetate layer was separated, washed with water, dried over anhydrous sodium sulfate, and the solvent was distilled off under reduced pressure. Subsequently, the residue was purified by thin-layer chromatography (chloroform / methanol = 10/1) to obtain 29 mg of the title compound as a slightly yellow oil (yield: 28).
%). (The NMR data is the same as in Example 2.)

【0026】実施例5 2−エトキシ−3−[3−[2−(2−フェニル−5−
メチル−4−オキサゾリル)エチル]−1,2−ベンズ
イソキサゾール−6−イル]プロピオン酸 (1)2−ヒドロキシ−3−[3−[2−(2−フェニ
ル−5−メチル−4−オキサゾリル)エチル]−1,2
−ベンズイソキサゾール−6−イル]プロピオン酸エチ
ル <A法>参考例1で得られた2−ブロモ−3−[3−
[2−(2−フェニル−5−メチル−4−オキサゾリ
ル)エチル]−1,2−ベンズイソキサゾール−6−イ
ル]プロピオン酸メチル(360mg,0.767mm
ol)とTHF(1ml)の溶液に、氷冷下水酸化ナト
リウム(31mg,0.767mmol)、炭酸カルシ
ウム(77mg,0.767mmol)及び水(1m
l)の懸濁液を加え、徐々に室温に戻しながら一夜攪拌
した。更に23時間加熱還流後、反応物を酢酸酸性とし
酢酸エチルにて抽出、飽和食塩水で洗浄後、無水硫酸ナ
トリウムで乾燥した。減圧下溶媒を留去して得られた橙
色固形物にエタノール(5ml)と濃硫酸(2滴)を加
え2.5時間加熱還流した。減圧下エタノールを留去
し、水を加え酢酸エチルにて抽出、飽和食塩水で洗浄
後、無水硫酸ナトリウムにて乾燥した。減圧下溶媒を留
去して得られた粗体をシリカゲルカラムクロマトグラフ
ィ−に付し、n−ヘキサン/酢酸エチル=1/1の溶出
部より標題化合物(200mg,62.1%)を淡黄色
油状物として得た。
Example 5 2-ethoxy-3- [3- [2- (2-phenyl-5-
Methyl-4-oxazolyl) ethyl] -1,2-benzisoxazol-6-yl] propionic acid (1) 2-hydroxy-3- [3- [2- (2-phenyl-5-methyl-4-) Oxazolyl) ethyl] -1,2
-Benzisoxazol-6-yl] propionate <Method A> 2-Bromo-3- [3- obtained in Reference Example 1
Methyl [2- (2-phenyl-5-methyl-4-oxazolyl) ethyl] -1,2-benzisoxazol-6-yl] propionate (360 mg, 0.767 mm)
ol) and THF (1 ml) were added to a solution of sodium hydroxide (31 mg, 0.767 mmol), calcium carbonate (77 mg, 0.767 mmol) and water (1 ml) under ice-cooling.
1) The suspension was added, and the mixture was stirred overnight while gradually returning to room temperature. After heating under reflux for a further 23 hours, the reaction product was acidified with acetic acid, extracted with ethyl acetate, washed with brine, and dried over anhydrous sodium sulfate. Ethanol (5 ml) and concentrated sulfuric acid (2 drops) were added to the orange solid obtained by evaporating the solvent under reduced pressure, and the mixture was heated under reflux for 2.5 hours. Ethanol was distilled off under reduced pressure, water was added, extracted with ethyl acetate, washed with saturated saline, and dried over anhydrous sodium sulfate. The crude product obtained by evaporating the solvent under reduced pressure was subjected to silica gel column chromatography, and the title compound (200 mg, 62.1%) was obtained as a pale yellow oil from an elution portion of n-hexane / ethyl acetate = 1/1. Obtained as a product.

【0027】1H−NMR(CDCl3) δ: 1.28(3H,t,J=7Hz) 2.16(3H,s) 2.84(1H,d,J=5Hz) 3.03(2H,t,J=7Hz) 3.10(1H,dd,J=7,14Hz) 3.27(1H,dd,J=7,14Hz) 3.35(2H,t,J=7Hz) 4.22(2H,q,J=7Hz) 4.45〜4.5(1H,m) 7.12(1H,d,J=8Hz) 7.4〜7.5(5H,m) 7.9〜8.0(2H,m) 1 H-NMR (CDCl 3 ) δ: 1.28 (3H, t, J = 7 Hz) 2.16 (3H, s) 2.84 (1 H, d, J = 5 Hz) 3.03 (2H) , T, J = 7 Hz) 3.10 (1H, dd, J = 7, 14 Hz) 3.27 (1H, dd, J = 7, 14 Hz) 3.35 (2H, t, J = 7 Hz) 4.22 (2H, q, J = 7 Hz) 4.45 to 4.5 (1H, m) 7.12 (1H, d, J = 8 Hz) 7.4 to 7.5 (5H, m) 7.9 to 8 .0 (2H, m)

【0028】<B法> 2−ブロモ−3−[3−[2−(2−フェニル−5−
メチル−4−オキサゾリル)エチル]−1,2−ベンズ
イソキサゾール−6−イル]プロピオン酸及びそのナト
リウム塩 (a)参考例1で得られた2−ブロモ−3−[3−[2
−(2−フェニル−5−メチル−4−オキサゾリル)エ
チル]−1,2−ベンズイソキサゾール−6−イル]プ
ロピオン酸メチル(360mg,0.767mmol)
とテトラヒドロフラン(1ml)の溶液に、氷冷下水酸
化ナトリウム(31mg,0.767mmol)、炭酸
カルシウム(77mg,0.767mmol)および水
(1ml)の懸濁液を加え、徐々に室温に戻しながら一
夜攪拌した。 (b)ここで、酸性条件から反応生成物の一部を単離し
たところ、2−ブロモ−3−[3−[2−(2−フェニ
ル−5−メチル−4−オキサゾリル)エチル]−1,2
−ベンズイソキサゾール−6−イル]プロピオン酸が得
られた。2−ブロモ−3−[3−[2−(2−フェニル
−5−メチル−4−オキサゾリル)エチル]−1,2−
ベンズイソキサゾール−6−イル]プロピオン酸のNM
R値は参考例2と同じ。
<Method B> 2-Bromo-3- [3- [2- (2-phenyl-5-
Methyl-4-oxazolyl) ethyl] -1,2-benzisoxazol-6-yl] propionic acid and its sodium salt (a) 2-bromo-3- [3- [2] obtained in Reference Example 1
-(2-Phenyl-5-methyl-4-oxazolyl) ethyl] -1,2-benzisoxazol-6-yl] methyl propionate (360 mg, 0.767 mmol)
And a suspension of sodium hydroxide (31 mg, 0.767 mmol), calcium carbonate (77 mg, 0.767 mmol) and water (1 ml) under ice-cooling, and slowly returning to room temperature overnight. Stirred. (B) Here, when a part of the reaction product was isolated from the acidic condition, 2-bromo-3- [3- [2- (2-phenyl-5-methyl-4-oxazolyl) ethyl] -1 was obtained. , 2
[Benzisoxazol-6-yl] propionic acid was obtained. 2-bromo-3- [3- [2- (2-phenyl-5-methyl-4-oxazolyl) ethyl] -1,2-
NM of benzisoxazol-6-yl] propionic acid
The R value is the same as in Reference Example 2.

【0029】2−ヒドロキシ−3−[3−[2−(2
−フェニル−5−メチル−4−オキサゾリル)エチル]
−1,2−ベンズイソキサゾール−6−イル]プロピオ
ン酸 −(a)の反応混合物を更に23時間加熱還流後、酢
酸酸性とし酢酸エチルにて抽出、飽和食塩水で洗浄後、
無水硫酸ナトリウムで乾燥した。減圧下溶媒を留去して
得られた標記の2−ヒドロキシ−3−[3−[2−(2
−フェニル−5−メチル−4−オキサゾリル)エチル]
−1,2−ベンズイソキサゾール−6−イル]プロピオ
ン酸の橙色固形物を得た。
2-hydroxy-3- [3- [2- (2
-Phenyl-5-methyl-4-oxazolyl) ethyl]
The reaction mixture of -1,2-benzisoxazol-6-yl] propionic acid- (a) was further heated under reflux for 23 hours, acidified with acetic acid, extracted with ethyl acetate, washed with saturated saline, and then washed.
Dry over anhydrous sodium sulfate. The solvent was distilled off under reduced pressure to give the title 2-hydroxy-3- [3- [2- (2
-Phenyl-5-methyl-4-oxazolyl) ethyl]
An orange solid of -1,2-benzisoxazol-6-yl] propionic acid was obtained.

【0030】1H−NMR(CDCl3) δ: 2.20(3H,s) 3.03(2H,t,J=7Hz) 3.1〜3.2(2H,m) 3.35(2H,t,J=7Hz) 4.55〜4.60(1H,m) 7.15(1H,d,J=8Hz) 7.4〜7.5(4H,m) 7.61(1H,d,J=8Hz) 7.9〜8.0(2H,m) 1 H-NMR (CDCl 3 ) δ: 2.20 (3H, s) 3.03 (2H, t, J = 7 Hz) 3.1-3.2 (2H, m) 3.35 (2H) , T, J = 7 Hz) 4.55 to 4.60 (1H, m) 7.15 (1H, d, J = 8 Hz) 7.4 to 7.5 (4H, m) 7.61 (1H, d) , J = 8 Hz) 7.9 to 8.0 (2H, m)

【0031】2−ヒドロキシ−3−[3−[2−(2
−フェニル−5−メチル−4−オキサゾリル)エチル]
−1,2−ベンズイソキサゾール−6−イル]プロピオ
ン酸エチル で得られた橙色固形物にエタノール(5ml)と濃硫
酸(2滴)を加え2.5時間加熱還流した。減圧下エタ
ノールを留去し、水を加え酢酸エチルにて抽出、飽和食
塩水で洗浄後、無水硫酸ナトリウムにて乾燥した。減圧
下溶媒を留去して得られた粗体をシリカゲルカラムクロ
マトグラフィ−に付し、n−ヘキサン/酢酸エチル=1
/1の溶出部より標題化合物である2−ヒドロキシ−3
−[3−[2−(2−フェニル−5−メチル−4−オキ
サゾリル)エチル]−1,2−ベンズイソキサゾール−
6−イル]プロピオン酸エチル(200mg,62.1
%)を淡黄色油状物として得た。NMRデータはA法で
得られたものと同じ。
2-hydroxy-3- [3- [2- (2
-Phenyl-5-methyl-4-oxazolyl) ethyl]
Ethanol (5 ml) and concentrated sulfuric acid (2 drops) were added to the orange solid obtained with ethyl-1,2-benzisoxazol-6-yl] propionate, and the mixture was heated under reflux for 2.5 hours. Ethanol was distilled off under reduced pressure, water was added, extracted with ethyl acetate, washed with saturated saline, and dried over anhydrous sodium sulfate. The crude product obtained by evaporating the solvent under reduced pressure was subjected to silica gel column chromatography, and n-hexane / ethyl acetate = 1
/ 1, the title compound 2-hydroxy-3
-[3- [2- (2-phenyl-5-methyl-4-oxazolyl) ethyl] -1,2-benzisoxazole-
6-yl] ethyl propionate (200 mg, 62.1
%) As a pale yellow oil. NMR data are the same as those obtained by Method A.

【0032】(2)2−エトキシ−3−[3−[2−
(2−フェニル−5−メチル−4−オキサゾリル)エチ
ル]−1,2−ベンズイソキサゾール−6−イル]プロ
ピオン酸エチル (1)で得られたヒドロキシ体(A法:190mg,
0.452mmol)を乾燥THF(1.5ml)に溶
解し、氷冷下60%水素化ナトリウム(27.1mg,
0.678mmol)を加え、同温にて1時間攪拌し
た。これにヨウ化エチル(705mg,4.52mmo
l)と乾燥THF(1ml)の溶液を滴下し、徐々に室
温に戻しながら一夜攪拌した。反応物を氷水中に注ぎ酢
酸エチルにて抽出、飽和食塩水で洗浄した。無水硫酸ナ
トリウムにて乾燥後、減圧下溶媒を留去して得られた粗
体をシリカゲルカラムクロマトグラフィ−に付し、n−
ヘキサン/酢酸エチル=1/1の溶出部より標題化合物
(126mg,62.3%)を無色油状物として得た。
(2) 2-ethoxy-3- [3- [2-
Ethyl (2-phenyl-5-methyl-4-oxazolyl) ethyl] -1,2-benzisoxazol-6-yl] propionate Hydroxy form obtained by (1) (Method A: 190 mg,
0.452 mmol) was dissolved in dry THF (1.5 ml) and the mixture was dissolved in 60% sodium hydride (27.1 mg,
0.678 mmol) and stirred at the same temperature for 1 hour. Ethyl iodide (705 mg, 4.52 mmol
l) and a solution of dry THF (1 ml) were added dropwise, and the mixture was stirred overnight while gradually returning to room temperature. The reaction product was poured into ice water, extracted with ethyl acetate, and washed with saturated saline. After drying over anhydrous sodium sulfate, the crude product obtained by evaporating the solvent under reduced pressure was subjected to silica gel column chromatography to give n-
The title compound (126 mg, 62.3%) was obtained as a colorless oil from a fraction eluted with hexane / ethyl acetate = 1/1.

【0033】1H−NMR(CDCl3) δ: 1.14(3H,t,J=7Hz) 1.23(3H,t,J=7Hz) 2.15(3H,s) 3.04(2H,t,J=7Hz) 3.1〜3.2(2H,m) 3.3〜3.4(3H,m) 3.6〜3.7(1H,m) 4.04(1H,dd,J=5,8Hz) 4.17(2H,q,J=7Hz) 7.15(1H,d,J=9Hz) 7.4〜8.0(7H,m) 1 H-NMR (CDCl 3 ) δ: 1.14 (3H, t, J = 7 Hz) 1.23 (3H, t, J = 7 Hz) 2.15 (3H, s) 3.04 (2H) , T, J = 7 Hz) 3.1-3.2 (2H, m) 3.3-3.4 (3H, m) 3.6-3.7 (1H, m) 4.04 (1H, dd) , J = 5.8 Hz) 4.17 (2H, q, J = 7 Hz) 7.15 (1H, d, J = 9 Hz) 7.4-8.0 (7H, m)

【0034】(3)2−エトキシ−3−[3−[2−
(2−フェニル−5−メチル−4−オキサゾリル)エチ
ル]−1,2−ベンズイソキサゾール−6−イル]プロ
ピオン酸 (2)で得られたエステル体(6.44g,14.4m
mol)をTHF(60ml)に溶解し、氷冷下1N水
酸化ナトリウム水溶液(15.8ml,15.8mmo
l)、次いで水(45ml)を加え、徐々に室温に戻し
ながら一夜攪拌した。減圧下THFを留去し水(20m
l)を加え、氷冷下1N塩酸(16ml)及び水(30
ml)を加え同温にて3時間攪拌した。析出した結晶を
濾取、水(50ml)で2回洗浄、風乾後減圧下50℃
で一夜乾燥し標題化合物(5.25g,86.9%)を
白色結晶として得た。(NMR及びIRデータは実施例
1と同じ)
(3) 2-ethoxy-3- [3- [2-
(2-Phenyl-5-methyl-4-oxazolyl) ethyl] -1,2-benzisoxazol-6-yl] propionic acid (6.44 g, 14.4 m) obtained with (2)
mol) was dissolved in THF (60 ml), and 1N aqueous sodium hydroxide solution (15.8 ml, 15.8 mmol) was added under ice cooling.
1) Then, water (45 ml) was added, and the mixture was stirred overnight while gradually returning to room temperature. The THF was distilled off under reduced pressure and water (20 m
1) hydrochloric acid (16 ml) and water (30 ml) under ice-cooling.
ml) and stirred at the same temperature for 3 hours. The precipitated crystals were collected by filtration, washed twice with water (50 ml), air-dried, and then reduced to 50 ° C under reduced pressure.
Overnight to give the title compound (5.25 g, 86.9%) as white crystals. (The NMR and IR data are the same as in Example 1.)

Claims (6)

【特許請求の範囲】[Claims] 【請求項1】一般式(II)、 【化1】 (式中、Aはアリ−ル基を表し、そしてXは脱離基を表
す)で表される3−アリ−ルプロピオン酸の金属塩を、
アルカリ金属、アルカリ土類金属若しくは銀の弱酸塩、
又はアルカリ土類金属若しくは銀の酸化物から選ばれる
添加剤の存在下、 R-OH (式中、Rはアルキル基を表す)で表されるアルコ−ル
と反応させることを特徴とする、一般式(I)、 【化2】 (式中、A及びRは前記と同じ)で表される2−アルコ
キシ−3−アリ−ルプロピオン酸の製造方法。
(1) a compound represented by the general formula (II): (Wherein A represents an aryl group and X represents a leaving group), a metal salt of 3-arylpropionic acid represented by the formula:
Weak salts of alkali metals, alkaline earth metals or silver,
Or reacting with an alcohol represented by R-OH (wherein R represents an alkyl group) in the presence of an additive selected from an alkaline earth metal or silver oxide. Formula (I): (Wherein, A and R are the same as described above), and a method for producing 2-alkoxy-3-arylpropionic acid represented by the formula:
【請求項2】一般式(II)、 【化3】 (式中、Aはアリ−ル基を表し、そしてXは脱離基を表
す)で表される3−アリ−ルプロピオン酸に、当量〜少
過剰のアルカリを加えた後、これをアルカリ金属、アル
カリ土類金属若しくは銀の弱酸塩、又はアルカリ土類金
属若しくは銀の酸化物から選ばれる添加剤の存在下、 R-OH (式中、Rはアルキル基を表す)で表されるアルコ−ル
と反応させることを特徴とする、一般式(I)、 【化4】 (式中、A及びRは前記と同じ)で表される2−アルコ
キシ−3−アリ−ルプロピオン酸の製造方法。
(2) a compound represented by the general formula (II): (Wherein A represents an aryl group and X represents a leaving group). An equivalent to a small excess of alkali is added to 3-arylpropionic acid represented by the formula An alcohol represented by R-OH (wherein R represents an alkyl group) in the presence of an additive selected from a weak acid salt of an alkaline earth metal or silver, or an oxide of an alkaline earth metal or silver. A compound represented by the general formula (I): (Wherein, A and R are the same as described above), and a method for producing 2-alkoxy-3-arylpropionic acid represented by the formula:
【請求項3】一般式(II)、 【化5】 (式中、Aはアリ−ル基を表し、そしてXは脱離基を表
す)で表される3−アリ−ルプロピオン酸の金属塩を、
アルカリ金属、アルカリ土類金属若しくは銀の弱酸塩、
又はアルカリ土類金属若しくは銀の酸化物から選ばれる
添加剤の存在下、水と反応させ、一般式(III)、 【化6】 (式中、Aは前記と同じ)で表される3−アリ−ル−2
−ヒドロキシプロピオン酸を得た後、次いでこれをカル
ボン酸基の保護或いは無保護下に、アルキル化剤と反応
させ、さらに必要に応じてカルボン酸基の保護基を脱離
することを特徴とする、一般式(I)、 【化7】 (式中、Rはアルキル基を表し、そしてAは前記と同
じ)で表される2−アルコキシ−3−アリ−ルプロピオ
ン酸の製造方法。
(3) a compound represented by the general formula (II): (Wherein A represents an aryl group and X represents a leaving group), a metal salt of 3-arylpropionic acid represented by the formula:
Weak salts of alkali metals, alkaline earth metals or silver,
Or reacting with water in the presence of an additive selected from an alkaline earth metal or silver oxide to obtain a compound represented by the general formula (III): (Wherein A is the same as described above)
After obtaining hydroxypropionic acid, this is then reacted with an alkylating agent with or without protection of the carboxylic acid group, and if necessary, the protecting group of the carboxylic acid group is eliminated. , The general formula (I): (Wherein R represents an alkyl group and A is the same as described above).
【請求項4】一般式(IV)、 【化8】 (式中、Aはアリ−ル基を表し、R0はアルキル基を表
し、そしてXは脱離基を表す)で表される3−アリ−ル
プロピオン酸エステルにアルカリを加え、これをアルカ
リ金属、アルカリ土類金属若しくは銀の弱酸塩、又はア
ルカリ土類金属若しくは銀の酸化物から選ばれる添加剤
の存在下、水と反応させ、一般式(III)、 【化9】 (式中、Aは前記と同じ)で表される3−アリ−ル−2
−ヒドロキシプロピオン酸を得た後、次いでこれをカル
ボン酸基の保護或いは無保護下に、アルキル化剤と反応
させ、さらに必要に応じてカルボン酸基の保護基を脱離
することを特徴とする、一般式(I)、 【化10】 (式中、Rはアルキル基を表し、そしてAは前記と同
じ)で表される2−アルコキシ−3−アリ−ルプロピオ
ン酸の製造方法。
(4) a compound represented by the general formula (IV): Wherein A represents an aryl group, R 0 represents an alkyl group, and X represents a leaving group, and an alkali is added to the 3-arylpropionate represented by the formula Reacting with water in the presence of an additive selected from a metal, an alkaline earth metal or silver weak acid salt, or an alkaline earth metal or silver oxide to obtain a compound represented by the general formula (III): (Wherein A is the same as described above)
After obtaining hydroxypropionic acid, this is then reacted with an alkylating agent with or without protection of the carboxylic acid group, and if necessary, the protecting group of the carboxylic acid group is eliminated. , The general formula (I): (Wherein R represents an alkyl group and A is the same as described above).
【請求項5】添加剤がアルカリ金属又はアルカリ土類金
属の炭酸塩である請求項1乃至4に記載の2−アルコキ
シ−3−アリ−ルプロピオン酸の製造方法。
5. The method for producing 2-alkoxy-3-arylpropionic acid according to claim 1, wherein the additive is an alkali metal or alkaline earth metal carbonate.
【請求項6】添加剤が酸化銀、炭酸カルシウム又は炭酸
セシウムである請求項1乃至4に記載の2−アルコキシ
−3−アリ−ルプロピオン酸の製造方法。
6. The method for producing 2-alkoxy-3-arylpropionic acid according to claim 1, wherein the additive is silver oxide, calcium carbonate or cesium carbonate.
JP5608798A 1998-02-20 1998-02-20 Production of 2-alkoxy-3-arylpropionic acid Ceased JPH11236348A (en)

Priority Applications (1)

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Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
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Publications (1)

Publication Number Publication Date
JPH11236348A true JPH11236348A (en) 1999-08-31

Family

ID=13017324

Family Applications (1)

Application Number Title Priority Date Filing Date
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Country Status (1)

Country Link
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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100474137B1 (en) * 2001-11-16 2005-03-08 (주)바이오뉴트리젠 Novel arylpropionic acid derivatives and composition for preventing or treating diabetes comprising same

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100474137B1 (en) * 2001-11-16 2005-03-08 (주)바이오뉴트리젠 Novel arylpropionic acid derivatives and composition for preventing or treating diabetes comprising same

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